在 C# 中创建 Asp.net Web Api 时遇到问题，详情如下：

Question

每当我尝试运行我的应用程序时，它都不会执行并显示此错误。

错误：

我试图搜索它，但没有得到任何有用的信息，最重要的是我确实对 Web.config 进行了更改，但仍然无法在我的应用程序中找到 web.config。任何可以解决此问题的帮助将不胜感激。

我找不到 web.config 文件的解决方案资源管理器图片：

Employee 控制器：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using My_Work.Models;

namespace My_Work.Controllers
{
    public class EmployeeController : ApiController
    {
        [HttpGet]
        public IEnumerable<Employee> Get(Employee employee)
        {
            Employee emp = new Employee();
            return emp.GetList(employee);
        }

    }
}

Employee 型号：

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
using System.Configuration;
using System.Data.SqlClient;

namespace My_Work.Models
{
    public class Employee
    {
        public int EmployeeID { get; set; }
        [Required]
        public string FirstName { get; set; }
        public string LastName { get; set; }
        [Required]
        public string Gender { get; set; }
        [Required]
        [Range(20, 60, ErrorMessage = "Age must be between 20 and  60")]
        [Display(Name = "Age")]
        public int Age { get; set; }

        [Required]
        [Display(Name = "Education Level")]
        public int EducationLevel { get; set; }
        [Range(25000, 500000, ErrorMessage = "Please enter correct value")]
        [Required]
        /* We can control the display of data in a View (UI) using
       display attributes */
        [Display(Name = "Salary")]
        public int Salary { get; set; }
        [Required]
        [EmailAddress]
        public string EmailAddress { get; set; }
        [Required(ErrorMessage = "Please enter hire date")]
        [Display(Name = "Hire Date")]
        [CustomHireDate(ErrorMessage = "Hire Date must be less than or equal to Today's Date")]
        [DataType(DataType.Date)]
        public DateTime? HireDate { get; set; }
        public string City { get; set; }
        public string ImageURL { get; set; }
        [Required]
        [Display(Name = "Upload Photo")]

        string ConnectionString = ConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString;
        SqlConnection sqlConnection = null;
        SqlCommand cmd = null;
        public List<Employee> GetList(Employee employee)
        {
            List<Employee> employeesList = new List<Employee>();
            sqlConnection = new SqlConnection(ConnectionString);
            string query = string.Empty;
            query = @"select * from Employee";
            cmd = new SqlCommand(query, sqlConnection);
            sqlConnection.Open();
            SqlDataReader dataReader = cmd.ExecuteReader();
            while (dataReader.Read())
            {
                employeesList.Add(new Employee
                {

                    EmployeeID = Convert.ToInt32(dataReader["EmployeeId"].ToString()),
                    FirstName = dataReader["FirstName"].ToString(),
                    LastName = dataReader["LastName"].ToString(),
                    Gender = dataReader["Gender"].ToString(),
                    City = dataReader["City"].ToString(),
                    EmailAddress = dataReader["EmailAddress"].ToString(),
                    Age = Convert.ToInt32(dataReader["Age"].ToString()),
                    Salary = Convert.ToInt32(dataReader["Salary"].ToString()),
                    EducationLevel = Convert.ToInt32(dataReader["EducationLevel"].ToString()),
                    HireDate = DateTime.Parse(dataReader["HireDate"].ToString()),
                    ImageURL = dataReader["ImageURL"].ToString(),
                });
                ;
            }
            sqlConnection.Close();
            return employeesList;
        }
        

    }
}

Answer 1

你应该运行你的网站API来自这个地址http://localhost:18084/Employee

在 C# 中创建 Asp.net Web Api 时遇到问题，详情如下：

Facing issues in Creating Asp.net Web Api in C# with details below:

c#

asp.net-web-api

visual-studio-2017

webapi